Offer yourselves as a sacrifice: be a good, faithful person

A concept that helps show that a believer is one who acts the right way as well as says he/she believes is in Romans 12 as well as in Omni 1 in the Book of Mormon.

There Paul talks about the need to offer oneself as a sacrifice. What is sacrificed? The bad things someone may be inclined to do:

1 I beseech you therefore, brethren, by the mercies of God, that ye present your ^abodies a living ^bsacrifice, holy, ^cacceptable unto God, which is your reasonable ^dservice.

Offer yourselves as an offering to God. Become the person he wants you to become. This is a reasonable ask from God who gives so much and sacrificed his Son to allow us to become like Him eternally. Omni 1 gives a similar message:

26 And now, my beloved brethren, I would that ye should ^acomeunto Christ, who is the Holy One of Israel, and partake of his salvation, and the power of his redemption. Yea, come unto him, and ^boffer your whole souls as an ^coffering unto him, and continue in ^dfasting and praying, and endure to the end; and as the Lord liveth ye will be saved.

Once again, offer your souls to Christ, continuing in fasting and praying to keep the faith, and if you keep faithful to the end, you're guaranteed salvation. Once again, a great tradeoff for being faithful.

Returning to Paul's message - he then spends the rest of Romans 12 giving examples of what it is to offer yourself as a sacrifice to God. It's doing what he asks: weeping with those that weep (see also Mosiah 18:8-9), showing mercy happily, not being evil to those who are evil to you, having faith, cleave to that which is good, love truly, etc.

Being good to people, and believing in the Lord's efforts on our behalf, and following his messages through prophets is the way to happiness and offering as a sacrifice.